A Study on Diamond-like Carbon Films for Medical Applications

High tribological performances of DLC (Diamond-like Carbon) films have been investigated. In this study, we so focused on the medical application of DLC films through simulation of real body condition. DLC films were prepared on Si-wafer by r.f. plasma CVD (Chemical Vapor Deposition) using benzene at a pressure of 10mTorr, and tested in atmosphere and in saline solution on different stubstrate (Ti & Ti-6Al-4V). The results showed that friction-coefficients and lifetime of films depend on substrates and test conditions. The lifetime of DLc in saline solution was decreased due to delamination of film when compared to that in atmosphere. Determining parameter of rupture of film in saline solution was not abrasive wear but delamination of film.